18-8
18-4. Teaching for powder plasma welding
Arc start/arc end programs for CO2/MAG/MIG welding are factory registered at shipment. It is necessary to change
those settings for powder plasma welding prior to teaching operation of powder plasma welding.
18-4-1. Teaching welding program
The different point in teaching in powder plasma welding from CO2/MAG welding is that in powder plasma welding, it is
necessary to ignite the pilot arc prior to starting welding operation.
The pilot arc serves as pilot burner to generate plasma arc. Therefore, provide a pilot arc firing teaching point before the
arc start point and also a teaching point to pilot arc extinguishing teaching point after the arc end point. That is, turn ON
and OFF the pilot arc before and after the weld section respectively. (In case of welding consecutive weld sections, it is
not necessary turn off and then on the pilot arc at each weld section.)
Example of welding program
Program
Definition
○
MOVEL P4 15.00
WAIT-PLARC
: Pilot arc ON
PLARC ON
: Wait until the pilot arc ignites
●
MOVEL P5 1.0
ARC-SET_POWD Ib=10 Ip=20 PF=10 FRQ=2.0 S=0.50
: Set welding conditions
ARC-ON ArcStart1Powd.prg
: Start welding
○
MOVEL P6 0.50
CRATER_POWD Ib=10 Ip=10 PF=10 FRQ=2.0 T=0.40
: Set crater conditions
ARC-OFF ArcEnd1Powd.prg
: End welding
○
MOVEL P7 7.50
PLARC OFF
: Pilot arc ON
(
○
… air-cut point,
●
… welding point)